US20100150662A1 - Vortex induced vibration suppression systems and methods - Google Patents
Vortex induced vibration suppression systems and methods Download PDFInfo
- Publication number
- US20100150662A1 US20100150662A1 US12/527,058 US52705808A US2010150662A1 US 20100150662 A1 US20100150662 A1 US 20100150662A1 US 52705808 A US52705808 A US 52705808A US 2010150662 A1 US2010150662 A1 US 2010150662A1
- Authority
- US
- United States
- Prior art keywords
- sleeve
- subsea structure
- exterior
- water
- induced vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000001629 suppression Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 210000002435 tendon Anatomy 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/0017—Means for protecting offshore constructions
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/10—Influencing flow of fluids around bodies of solid material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
- B63B2021/504—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs comprising suppressors for vortex induced vibrations
Definitions
- This invention is related to vortex induced vibration suppression systems that can be attached to flexible structures to reduce drag and/or vortex induced vibration (VIV).
- VIV vortex-induced vibrations
- Drilling for and/or producing hydrocarbons or the like from subterranean deposits which exist under a body of water exposes underwater drilling and production equipment to water currents and the possibility of VIV.
- Equipment exposed to VIV may include structures ranging from the smaller tubes of a riser system, anchoring tendons, hoses, umbilicals, and other flexible members.
- Umbilicals as used herein are defined to be a non-exclusive example of a marine element subject to VIV.
- an umbilical system is used for establishing communication between the surface and the bottom of a water body.
- the principal purpose of the umbilical is to provide a fluid, electrical, and/or optical flow path between a surface vessel and a subsurface structure.
- the first kind of stress as mentioned above is caused by vortex-induced alternating forces that vibrate the underwater structure in a direction perpendicular to the direction of the current. These are referred to as vortex-induced vibrations (VIV).
- VIV vortex-induced vibrations
- the second type of stress is caused by drag forces which push the structure in the direction of the current due to the structure's resistance to fluid flow.
- the drag forces may be amplified by vortex induced vibrations of the structure. For instance, an umbilical that is vibrating due to vortex shedding will disrupt the flow of water around it more so than a stationary umbilical. This results in greater energy transfer from the current to the umbilical, and hence more drag.
- U.S. Pat. No. 5,984,584 discloses a fairing system for protecting multiple, parallel, bundled but separate cylindrical elements deployed in offshore applications.
- the fairing system deploys a plurality of elongated fairing surface elements foldable about an axis with a connection system joining the elongated edges of the fairing surface elements in a folded manner about the axis.
- a plurality of thrust bearings are orthogonally connected across the fairing surface elements at each axial end and an axially extending circular rotational surface is defined by the interior of each of the folded fairing surface elements and a transverse edge of the thrust bearings connected thereto. This rotational surface has a diameter which circumscribes the multiple bundled cylindrical elements.
- a plurality of clamps interconnect the bundled, cylindrical elements and a bearing collar on the axial ends of the clamps is provided to receive the thrust bearings of the axial ends of the fairing elements.
- U.S. Pat. No. 5,984,584 is herein incorporated by reference in its entirety.
- U.S. Pat. No. 7,070,361 discloses an apparatus for suppressing vortex induced vibrations on a marine element of a riser system wherein the riser system comprises at least one umbilical element.
- Systems comprising and methods of using said apparatus to suppress vortex induced vibrations.
- the apparatus, systems, and methods comprise module elements which provide: i) a surface around a marine element for installing VIV suppression devices; and ii) passages for housing the at least one umbilical element.
- U.S. Pat. No. 7,070,361 is herein incorporated by reference in its entirety.
- surface structure 102 is in body of water 100 .
- Surface structure 102 is connected to subsurface structure 103 at seabed 108 by connector member 104 , such as an umbilical, cable, or tendon.
- Current 110 encounters connector member 104 .
- fairings 114 have been installed.
- One or more collars may be installed between adjacent fairings.
- VIV suppression devices When VIV suppression devices are installed on umbilicals or other flexible structures, there is a danger that the structure will be damaged during the installation procedure. Each VIV suppression device installation around a structure may damage the structure, for example, if the ROV or other installation tool cuts or crimps the structure, runs into or dislodges the structure, and other damage as can be imagined by a person of skill in the art.
- the invention provides a system comprising a subsea structure defining an interior of the system, the structure subject to a water current; a sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and a vortex induced vibration suppression device exterior to the sleeve.
- the invention provides a method comprising installing a subsea structure in a body of water, wherein the subsea structure is subject to one or more water currents; installing at least one sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and installing at least one vortex induced vibration suppression device exterior to the sleeve.
- FIG. 1 illustrates an oil and/or gas production system.
- FIG. 2 a illustrates an oil and/or gas production system.
- FIG. 2 b illustrates an oil and/or gas production system.
- FIG. 3 a illustrates an oil and/or gas production system.
- FIG. 3 b illustrates a cross-sectional view of the oil and/or gas production system of FIG. 3 a.
- FIG. 4 illustrates an oil and/or gas production system.
- FIG. 5 a illustrates an oil and/or gas production system.
- FIG. 5 b illustrates an oil and/or gas production system.
- System 200 includes surface structure 202 near the surface of the water, which is attached to connector member 204 .
- Connector member 204 is also connected to subsurface structure 203 near seafloor 208 .
- collar 220 Exterior to connector member 204 near seafloor 208 , collar 220 has been installed.
- sleeves 222 Exterior to connector member 204 , sleeves 222 have been installed, which rest on collar 220 .
- fairings 214 have been installed exterior to sleeves 222 .
- Sleeves 222 allow fairings 214 to be installed with less risk of damaging connector member 204 .
- Fairings 214 act to reduce drag and/or vortex induced vibration acting on connector member 204 due to current 210 .
- Fairings 214 and/or sleeves 222 may be heavier than water so that they sink to rest on collar 220 .
- System 300 includes surface structure 302 near the surface of the water, which is attached to connector member 304 .
- Connector member 304 is also connected to subsurface structure 303 near seafloor 308 .
- collar 320 has been installed.
- sleeves 322 have been installed, which rest on collar 320 .
- Fairings 314 have been installed exterior to sleeves 322 .
- Sleeves 322 allow fairings 314 to be installed with less risk of damaging connector member 304 .
- Fairings 314 act to reduce drag and/or vortex induced vibration acting on connector member 304 due to current 310 .
- Fairings 314 and/or sleeves 322 may be lighter than water so that they float to rest on collar 320 .
- Connector member 304 defines an interior of the system.
- Sleeve 322 has been installed exterior to connector member 304 .
- Fairing 314 has been installed exterior to sleeve 322 .
- Space 330 is defined between the exterior of sleeve 322 and the interior of fairing 314 , which allows fairing 314 to weathervane with varying current directions.
- System 400 includes surface structure 402 near the surface of the water, which is attached to connector member 404 .
- Connector member 404 is also connected to subsurface structure 403 near seafloor 408 .
- collar 420 has been installed.
- sleeves 422 and sleeves 424 have been installed, which rest on collar 420 .
- Fairings 414 have been installed exterior to sleeves 422 and sleeves 424 .
- Sleeves 424 may be installed between every about 1 to about 10 sleeves 422 .
- Sleeves 424 have flange 426 .
- Flange 426 has a larger diameter than an interior diameter of fairing 414 , which acts to provide a bearing surface that the fairing 414 above and/or the fairing below can rotate on.
- Flange 426 may be copper to retard marine growth.
- Sleeves 422 and sleeves 424 allow fairings 414 to be installed with less risk of damaging connector member 404 .
- Fairings 414 act to reduce drag and/or vortex induced vibration acting on connector member 404 due to current 410 .
- Fairings 414 , sleeves 424 , and/or sleeves 422 may be lighter than water so that they float to rest on collar 420 .
- System 500 includes surface structure 502 near the surface of the water, which is attached to connector member 504 .
- Connector member 504 is also connected to subsurface structure 503 near seafloor 508 .
- collar 520 has been installed.
- sleeve 522 has been installed, near subsurface structure 503 .
- Fairings 514 have been installed exterior to sleeve 522 with tool 530 having attachment mechanism 532 , for example arms, to grip fairings 514 .
- Sleeve 522 allows fairings 514 to be installed with less risk of damaging connector member 504 .
- Fairings 514 act to reduce drag and/or vortex induced vibration acting on connector member 504 due to current 510 .
- Fairings 514 may be lighter than water so that they float to rest on collar 520 .
- System 500 includes surface structure 502 near the surface of the water, which is attached to connector member 504 .
- Connector member 504 is also connected to subsurface structure 503 near seafloor 508 .
- collar 520 has been installed.
- sleeve 522 has been installed, near surface structure 502 .
- Fairings 514 have been installed exterior to sleeve 522 with tool 530 having attachment mechanism 532 , for example arms, to grip fairings 514 .
- Sleeve 522 allows fairings 514 to be installed with less risk of damaging connector member 504 .
- Fairings 514 act to reduce drag and/or vortex induced vibration acting on connector member 504 due to current 510 .
- Fairings 514 may be heavier than water so that they float to rest on collar 520 .
- Fairings may be replaced with strakes, shrouds, wake splitters, tail fairings, buoyancy modules, or other devices as are known in the art.
- Suitable sleeves, suitable collars, and suitable devices to install exterior to sleeves, and methods of their installation are disclosed in U.S. patent application Ser. No. 10/839,781, having attorney docket number TH1433; U.S. patent application Ser. No. 11/400,365, having attorney docket number TH0541; U.S. patent application Ser. No. 11/419,964, having attorney docket number TH2508; U.S. patent application Ser. No. 11/420,838, having attorney docket number TH2876; U.S. Patent Application No.
- the collars and/or sleeves may be installed on the connector member before or after the connector member is placed in a body of water.
- the sleeves may be made of a high strength material having a Young's Modulus (or modulus of elasticity) of at least about 2 GPa, for example at least about 5 GPa, for example at least about 10 GPa, for example at least about 25 GPa, for example at least about 50 GPa, for example at least about 75 GPa, for example at least about 100 GPa, for example at least about 200 GPa.
- Young's Modulus or modulus of elasticity
- the sleeves may be round, or have some ovality or a fairing shape.
- the sleeves, collars, fairings and/or other devices exterior to the sleeves may have a clamshell configuration, and may be hinged with a closing mechanism opposite the hinge, for example a mechanism that can be operated with an ROV.
- Collars may be placed between adjacent fairings, or between every 2 to 10 fairings.
- the collar may be a copper ring.
- Fairings may be provided with copper plates on their ends to allow them to weathervane with adjacent fairings or collars.
- Fairings may be partially manufactured from copper.
- a biodegradable spacer may be placed between adjacent fairings to keep them from binding and allow them to weathervane after the spacer has degraded.
- the connector member 404 may be made of a low strength material and/or have a low strength material as a covering, for example having a Young's Modulus (or modulus of elasticity) of less than about 2 GPa, for example less than about 1 GPa, for example less than about 0.5 GPa, for example less than about 0.25 GPa, for example less than about 0.1 GPa.
- a Young's Modulus or modulus of elasticity
- a system comprising a subsea structure defining an interior of the system, the structure subject to a water current; a sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and a vortex induced vibration suppression device exterior to the sleeve.
- the subsea structure is selected from an umbilical, a riser, and a tendon.
- the sleeve comprises an exterior surface having a Young's modulus of at least 2 GPa.
- the vortex induced vibration suppression device comprises a fairing or a helical strake.
- the subsea structure comprises an exterior surface having a Young's modulus less than 2 GPa.
- the sleeve is buoyant in water, the system further comprising a collar connected to the subsea structure above the sleeve, the collar adapted to retain the sleeve in an axial location along the subsea structure.
- the sleeve is negatively buoyant in water, the system further comprising a collar connected to the subsea structure below the sleeve, the collar adapted to retain the sleeve in an axial location along the subsea structure.
- the sleeve comprises one or more ledges extending exterior to the sleeve, for example circumferential ledges.
- the vortex induced vibration suppression device comprises one or more shoulders adapted to interface with the one or more ledges.
- the system also includes a plurality of sleeves.
- the system also includes a plurality of vortex induced vibration suppression devices exterior to the plurality of sleeves.
- the system also includes a collar between two adjacent vortex induced vibration suppression devices.
- a method comprising installing a subsea structure in a body of water, wherein the subsea structure is subject to one or more water currents; installing at least one sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and installing at least one vortex induced vibration suppression device exterior to the sleeve.
- the method also includes installing at least one collar exterior to the subsea structure, the collar adapted to retain the sleeve in an axial location along the subsea structure.
- the sleeve comprises an exterior surface having a Young's modulus of at least 2 GPa.
- the subsea structure comprises an exterior surface having a Young's modulus less than 2 GPa.
- the sleeves are installed on the subsea structure before the subsea structure is installed in the body of water.
- the vortex induced vibration suppression device are installed on the subsea structure after the subsea structure is installed in the body of water.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Ocean & Marine Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Earth Drilling (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Structure And Mechanism Of Cameras (AREA)
Abstract
A system comprising a subsea structure defining an interior of the system, the structure subject to a water current; a sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and a vortex induced vibration suppression device exterior to the sleeve.
Description
- This invention is related to vortex induced vibration suppression systems that can be attached to flexible structures to reduce drag and/or vortex induced vibration (VIV).
- Whenever a bluff body in a fluid environment, such as a cylinder, is subjected to a current in the fluid, it is possible for the body to experience vortex-induced vibrations (VIV). These vibrations may be caused by oscillating hydrodynamic forces on the surface, which can cause substantial vibrations of the structure, especially if the forcing frequency is at or near a structural natural frequency.
- Drilling for and/or producing hydrocarbons or the like from subterranean deposits which exist under a body of water exposes underwater drilling and production equipment to water currents and the possibility of VIV. Equipment exposed to VIV may include structures ranging from the smaller tubes of a riser system, anchoring tendons, hoses, umbilicals, and other flexible members.
- Umbilicals as used herein are defined to be a non-exclusive example of a marine element subject to VIV. Generally an umbilical system is used for establishing communication between the surface and the bottom of a water body. The principal purpose of the umbilical is to provide a fluid, electrical, and/or optical flow path between a surface vessel and a subsurface structure.
- There are generally two kinds of water current induced stresses to which elements of a umbilical system may be exposed. The first kind of stress as mentioned above is caused by vortex-induced alternating forces that vibrate the underwater structure in a direction perpendicular to the direction of the current. These are referred to as vortex-induced vibrations (VIV). When water flows past the structure, vortices are alternately shed from each side of the structure. This produces a fluctuating force on the structure transverse to the current. These vibrations can, depending on the stiffness and the strength of the structure and any welds, lead to unacceptably short fatigue lives. The second type of stress is caused by drag forces which push the structure in the direction of the current due to the structure's resistance to fluid flow. The drag forces may be amplified by vortex induced vibrations of the structure. For instance, an umbilical that is vibrating due to vortex shedding will disrupt the flow of water around it more so than a stationary umbilical. This results in greater energy transfer from the current to the umbilical, and hence more drag.
- Many methods have been developed to reduce vibrations of sub sea structures. Some of these methods to reduce vibrations caused by vortex shedding from subsea structures operate by stabilization of the wake. These methods include streamlined fairings, wake splitters and flags. Streamlined or teardrop shaped, fairings that swivel around a structure have been developed that almost eliminate the shedding or vortexes. Other conventional methods to reduce vibrations caused by vortex shedding from sub sea structures operate by modifying the boundary layer of the flow around the structure to prevent the correlation of vortex shedding along the length of the structure. Examples of such methods include the use of helical strakes around a structure, or axial rod shrouds and perforated shrouds.
- U.S. Pat. No. 5,984,584 discloses a fairing system for protecting multiple, parallel, bundled but separate cylindrical elements deployed in offshore applications. The fairing system deploys a plurality of elongated fairing surface elements foldable about an axis with a connection system joining the elongated edges of the fairing surface elements in a folded manner about the axis. A plurality of thrust bearings are orthogonally connected across the fairing surface elements at each axial end and an axially extending circular rotational surface is defined by the interior of each of the folded fairing surface elements and a transverse edge of the thrust bearings connected thereto. This rotational surface has a diameter which circumscribes the multiple bundled cylindrical elements. A plurality of clamps interconnect the bundled, cylindrical elements and a bearing collar on the axial ends of the clamps is provided to receive the thrust bearings of the axial ends of the fairing elements. U.S. Pat. No. 5,984,584 is herein incorporated by reference in its entirety.
- U.S. Pat. No. 7,070,361 discloses an apparatus for suppressing vortex induced vibrations on a marine element of a riser system wherein the riser system comprises at least one umbilical element. Systems comprising and methods of using said apparatus to suppress vortex induced vibrations. The apparatus, systems, and methods comprise module elements which provide: i) a surface around a marine element for installing VIV suppression devices; and ii) passages for housing the at least one umbilical element. U.S. Pat. No. 7,070,361 is herein incorporated by reference in its entirety.
- Referring now to
FIG. 1 ,surface structure 102 is in body ofwater 100.Surface structure 102 is connected tosubsurface structure 103 atseabed 108 byconnector member 104, such as an umbilical, cable, or tendon. Current 110encounters connector member 104. To protectconnector member 104 from vibration caused by current 110,fairings 114 have been installed. One or more collars (not shown) may be installed between adjacent fairings. - When VIV suppression devices are installed on umbilicals or other flexible structures, there is a danger that the structure will be damaged during the installation procedure. Each VIV suppression device installation around a structure may damage the structure, for example, if the ROV or other installation tool cuts or crimps the structure, runs into or dislodges the structure, and other damage as can be imagined by a person of skill in the art.
- There is a need in the art for improved apparatus and methods for suppressing VIV.
- There is a need in the art for apparatus and methods for suppressing VIV that do not suffer from the disadvantages of the prior art.
- There is a need in the art for apparatus and methods for providing VIV suppression to umbilical systems and other flexible elements and for providing protection to the flexible elements.
- There is a need for systems and methods of installing VIV suppression devices to flexible elements without damaging the flexible elements.
- These and other needs will become apparent to those of skill in the art upon review of this specification, including its drawings and claims.
- In one aspect, the invention provides a system comprising a subsea structure defining an interior of the system, the structure subject to a water current; a sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and a vortex induced vibration suppression device exterior to the sleeve.
- In another aspect, the invention provides a method comprising installing a subsea structure in a body of water, wherein the subsea structure is subject to one or more water currents; installing at least one sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and installing at least one vortex induced vibration suppression device exterior to the sleeve.
- Advantages of the invention may include one or more of the following:
- improved apparatus and methods for suppressing VIV;
- apparatus and methods for suppressing VIV that do not suffer from the disadvantages of the prior art;
- apparatus and methods for providing VIV suppression to an umbilical or other flexible elements and for providing protection to the flexible elements;
- systems and methods of installing VIV suppression devices to flexible elements without damaging the flexible elements; and/or
- systems and methods of installing VIV suppression devices to subsea structures without damaging the structure.
-
FIG. 1 illustrates an oil and/or gas production system. -
FIG. 2 a illustrates an oil and/or gas production system. -
FIG. 2 b illustrates an oil and/or gas production system. -
FIG. 3 a illustrates an oil and/or gas production system. -
FIG. 3 b illustrates a cross-sectional view of the oil and/or gas production system ofFIG. 3 a. -
FIG. 4 illustrates an oil and/or gas production system. -
FIG. 5 a illustrates an oil and/or gas production system. -
FIG. 5 b illustrates an oil and/or gas production system. - Referring now to
FIG. 2 a,system 200 is illustrated.System 200 includessurface structure 202 near the surface of the water, which is attached toconnector member 204.Connector member 204 is also connected tosubsurface structure 203 nearseafloor 208. Exterior toconnector member 204 nearseafloor 208,collar 220 has been installed. Exterior toconnector member 204,sleeves 222 have been installed, which rest oncollar 220. - Referring now to
FIG. 2 b,fairings 214 have been installed exterior tosleeves 222.Sleeves 222 allowfairings 214 to be installed with less risk ofdamaging connector member 204.Fairings 214 act to reduce drag and/or vortex induced vibration acting onconnector member 204 due to current 210.Fairings 214 and/orsleeves 222 may be heavier than water so that they sink to rest oncollar 220. - Referring now to
FIG. 3 a,system 300 is illustrated.System 300 includessurface structure 302 near the surface of the water, which is attached toconnector member 304.Connector member 304 is also connected tosubsurface structure 303 nearseafloor 308. Exterior toconnector member 304 nearsurface structure 302,collar 320 has been installed. Exterior toconnector member 304,sleeves 322 have been installed, which rest oncollar 320.Fairings 314 have been installed exterior tosleeves 322.Sleeves 322 allowfairings 314 to be installed with less risk ofdamaging connector member 304.Fairings 314 act to reduce drag and/or vortex induced vibration acting onconnector member 304 due to current 310.Fairings 314 and/orsleeves 322 may be lighter than water so that they float to rest oncollar 320. - Referring now to
FIG. 3 b, a cross-sectional view ofsystem 300 is shown.Connector member 304 defines an interior of the system.Sleeve 322 has been installed exterior toconnector member 304. Fairing 314 has been installed exterior tosleeve 322.Space 330 is defined between the exterior ofsleeve 322 and the interior of fairing 314, which allows fairing 314 to weathervane with varying current directions. - Referring now to
FIG. 4 ,system 400 is illustrated.System 400 includessurface structure 402 near the surface of the water, which is attached toconnector member 404.Connector member 404 is also connected tosubsurface structure 403 nearseafloor 408. Exterior toconnector member 404 nearsubsurface structure 403,collar 420 has been installed. Exterior toconnector member 404, sleeves 422 andsleeves 424 have been installed, which rest oncollar 420.Fairings 414 have been installed exterior to sleeves 422 andsleeves 424.Sleeves 424 may be installed between every about 1 to about 10 sleeves 422.Sleeves 424 haveflange 426.Flange 426 has a larger diameter than an interior diameter of fairing 414, which acts to provide a bearing surface that the fairing 414 above and/or the fairing below can rotate on.Flange 426 may be copper to retard marine growth. - Sleeves 422 and
sleeves 424 allowfairings 414 to be installed with less risk ofdamaging connector member 404.Fairings 414 act to reduce drag and/or vortex induced vibration acting onconnector member 404 due to current 410.Fairings 414,sleeves 424, and/or sleeves 422 may be lighter than water so that they float to rest oncollar 420. - Referring now to
FIG. 5 a,system 500 is illustrated.System 500 includessurface structure 502 near the surface of the water, which is attached toconnector member 504.Connector member 504 is also connected tosubsurface structure 503 nearseafloor 508. Exterior toconnector member 504 nearsurface structure 502,collar 520 has been installed. Exterior toconnector member 504,sleeve 522 has been installed, nearsubsurface structure 503.Fairings 514 have been installed exterior tosleeve 522 withtool 530 havingattachment mechanism 532, for example arms, to gripfairings 514.Sleeve 522 allowsfairings 514 to be installed with less risk ofdamaging connector member 504.Fairings 514 act to reduce drag and/or vortex induced vibration acting onconnector member 504 due to current 510.Fairings 514 may be lighter than water so that they float to rest oncollar 520. - Referring now to
FIG. 5 b,system 500 is illustrated.System 500 includessurface structure 502 near the surface of the water, which is attached toconnector member 504.Connector member 504 is also connected tosubsurface structure 503 nearseafloor 508. Exterior toconnector member 504 nearsubsurface structure 503,collar 520 has been installed. Exterior toconnector member 504,sleeve 522 has been installed, nearsurface structure 502.Fairings 514 have been installed exterior tosleeve 522 withtool 530 havingattachment mechanism 532, for example arms, to gripfairings 514.Sleeve 522 allowsfairings 514 to be installed with less risk ofdamaging connector member 504.Fairings 514 act to reduce drag and/or vortex induced vibration acting onconnector member 504 due to current 510.Fairings 514 may be heavier than water so that they float to rest oncollar 520. - Fairings may be replaced with strakes, shrouds, wake splitters, tail fairings, buoyancy modules, or other devices as are known in the art. Suitable sleeves, suitable collars, and suitable devices to install exterior to sleeves, and methods of their installation are disclosed in U.S. patent application Ser. No. 10/839,781, having attorney docket number TH1433; U.S. patent application Ser. No. 11/400,365, having attorney docket number TH0541; U.S. patent application Ser. No. 11/419,964, having attorney docket number TH2508; U.S. patent application Ser. No. 11/420,838, having attorney docket number TH2876; U.S. Patent Application No. 60/781,846 having attorney docket number TH2969; U.S. Patent Application No. 60/805,136, having attorney docket number TH1500; U.S. Patent Application No. 60/866,968, having attorney docket number TH3112; U.S. Patent Application No. 60/866,972, having attorney docket number TH3190; U.S. Pat. No. 5,410,979; U.S. Pat. No. 5,410,979; U.S. Pat. No. 5,421,413; U.S. Pat. No. 6,179,524; U.S. Pat. No. 6,223,672; U.S. Pat. No. 6,561,734; U.S. Pat. No. 6,565,287; U.S. Pat. No. 6,571,878; U.S. Pat. No. 6,685,394; U.S. Pat. No. 6,702,026; U.S. Pat. No. 7,017,666; and U.S. Pat. No. 7,070,361, which are herein incorporated by reference in their entirety.
- Suitable methods for installing sleeves, collars, and other devices to install exterior to sleeves, are disclosed in U.S. patent application Ser. No. 10/784,536, having attorney docket number TH1853.04; U.S. patent application Ser. No. 10/848,547, having attorney docket number TH2463; U.S. patent application Ser. No. 11/596,437, having attorney docket number TH2900; U.S. patent application Ser. No. 11/468,690, having attorney docket number TH2926; U.S. patent application Ser. No. 11/612,203, having attorney docket number TH2875; U.S. Patent Application No. 60/806,882, having attorney docket number TH2879; U.S. Patent Application No. 60/826,553, having attorney docket number TH2842; U.S. Pat. No. 6,695,539; U.S. Pat. No. 6,928,709; and U.S. Pat. No. 6,994,492; which are herein incorporated by reference in their entirety.
- The collars and/or sleeves may be installed on the connector member before or after the connector member is placed in a body of water.
- The sleeves may be made of a high strength material having a Young's Modulus (or modulus of elasticity) of at least about 2 GPa, for example at least about 5 GPa, for example at least about 10 GPa, for example at least about 25 GPa, for example at least about 50 GPa, for example at least about 75 GPa, for example at least about 100 GPa, for example at least about 200 GPa.
- The sleeves may be round, or have some ovality or a fairing shape.
- The sleeves, collars, fairings and/or other devices exterior to the sleeves may have a clamshell configuration, and may be hinged with a closing mechanism opposite the hinge, for example a mechanism that can be operated with an ROV.
- Collars may be placed between adjacent fairings, or between every 2 to 10 fairings. The collar may be a copper ring.
- Fairings may be provided with copper plates on their ends to allow them to weathervane with adjacent fairings or collars.
- Fairings may be partially manufactured from copper.
- A biodegradable spacer may be placed between adjacent fairings to keep them from binding and allow them to weathervane after the spacer has degraded.
- The
connector member 404 may be made of a low strength material and/or have a low strength material as a covering, for example having a Young's Modulus (or modulus of elasticity) of less than about 2 GPa, for example less than about 1 GPa, for example less than about 0.5 GPa, for example less than about 0.25 GPa, for example less than about 0.1 GPa. - In one embodiment, there is disclosed a system comprising a subsea structure defining an interior of the system, the structure subject to a water current; a sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and a vortex induced vibration suppression device exterior to the sleeve. In some embodiments, the subsea structure is selected from an umbilical, a riser, and a tendon. In some embodiments, the sleeve comprises an exterior surface having a Young's modulus of at least 2 GPa. In some embodiments, the vortex induced vibration suppression device comprises a fairing or a helical strake. In some embodiments, the subsea structure comprises an exterior surface having a Young's modulus less than 2 GPa. In some embodiments, the sleeve is buoyant in water, the system further comprising a collar connected to the subsea structure above the sleeve, the collar adapted to retain the sleeve in an axial location along the subsea structure. In some embodiments, the sleeve is negatively buoyant in water, the system further comprising a collar connected to the subsea structure below the sleeve, the collar adapted to retain the sleeve in an axial location along the subsea structure. In some embodiments, the sleeve comprises one or more ledges extending exterior to the sleeve, for example circumferential ledges. In some embodiments, the vortex induced vibration suppression device comprises one or more shoulders adapted to interface with the one or more ledges. In some embodiments, the system also includes a plurality of sleeves. In some embodiments, the system also includes a plurality of vortex induced vibration suppression devices exterior to the plurality of sleeves. In some embodiments, the system also includes a collar between two adjacent vortex induced vibration suppression devices.
- In one embodiment, there is disclosed a method comprising installing a subsea structure in a body of water, wherein the subsea structure is subject to one or more water currents; installing at least one sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and installing at least one vortex induced vibration suppression device exterior to the sleeve. In some embodiments, the method also includes installing at least one collar exterior to the subsea structure, the collar adapted to retain the sleeve in an axial location along the subsea structure. In some embodiments, the sleeve comprises an exterior surface having a Young's modulus of at least 2 GPa. In some embodiments, the subsea structure comprises an exterior surface having a Young's modulus less than 2 GPa. In some embodiments, the sleeves are installed on the subsea structure before the subsea structure is installed in the body of water. In some embodiments, the vortex induced vibration suppression device are installed on the subsea structure after the subsea structure is installed in the body of water.
- Those of skill in the art will appreciate that many modifications and variations are possible in terms of the disclosed embodiments, configurations, materials and methods without departing from their spirit and scope. Accordingly, the scope of the claims appended hereafter and their functional equivalents should not be limited by particular embodiments described and illustrated herein, as these are merely exemplary in nature.
Claims (18)
1. A system, comprising:
a subsea structure defining an interior of the system, the structure subject to a water current;
a sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and
a vortex induced vibration suppression device exterior to the sleeve.
2. The system of claim 1 , wherein the subsea structure is selected from an umbilical, a riser, and a tendon.
3. The system of claim 1 , wherein the sleeve comprises an exterior surface having a Young's modulus of at least 2 GPa.
4. The system of claim 1 , wherein the vortex induced vibration suppression device comprises a fairing or a helical strake.
5. The system of claim 1 , wherein the subsea structure comprises an exterior surface having a Young's modulus less than 2 GPa.
6. The system of claim 1 , wherein the sleeve is buoyant in water, the system further comprising a collar connected to the subsea structure above the sleeve, the collar adapted to retain the sleeve in an axial location along the subsea structure.
7. The system of claim 1 , wherein the sleeve is negatively buoyant in water, the system further comprising a collar connected to the subsea structure below the sleeve, the collar adapted to retain the sleeve in an axial location along the subsea structure.
8. The system of claim 1 , wherein the sleeve comprises one or more ledges extending exterior to the sleeve, for example circumferential ledges.
9. The system of claim 8 , wherein the vortex induced vibration suppression device comprises one or more shoulders adapted to interface with the one or more ledges.
10. The system of claim 1 , further comprising a plurality of sleeves.
11. The system of claim 10 , further comprising a plurality of vortex induced vibration suppression devices exterior to the plurality of sleeves.
12. The system of claim 11 , further comprising a collar between two adjacent vortex induced vibration suppression devices.
13. A method, comprising:
installing a subsea structure in a body of water, wherein the subsea structure is subject to one or more water currents;
installing at least one sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and
installing at least one vortex induced vibration suppression device exterior to the sleeve.
14. The method of claim 13 , further comprising:
installing at least one collar exterior to the subsea structure, the collar adapted to retain the fairing and/or the sleeve in an axial location along the subsea structure.
15. The method of claim 13 , wherein the sleeve comprises an exterior surface having a Young's modulus of at least 2 GPa.
16. The method of claim 13 , wherein the subsea structure comprises an exterior surface having a Young's modulus less than 2 GPa.
17. The method of claim 13 , wherein the sleeve is installed on the subsea structure before the subsea structure is installed in the body of water.
18. The method of claim 13 , wherein the vortex induced vibration suppression device is installed on the subsea structure after the subsea structure is installed in the body of water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/527,058 US20100150662A1 (en) | 2007-02-15 | 2008-02-13 | Vortex induced vibration suppression systems and methods |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US89014007P | 2007-02-15 | 2007-02-15 | |
PCT/US2008/053784 WO2008100976A1 (en) | 2007-02-15 | 2008-02-13 | Vortex induced vibration suppression systems and methods |
US12/527,058 US20100150662A1 (en) | 2007-02-15 | 2008-02-13 | Vortex induced vibration suppression systems and methods |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100150662A1 true US20100150662A1 (en) | 2010-06-17 |
Family
ID=39690503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/527,058 Abandoned US20100150662A1 (en) | 2007-02-15 | 2008-02-13 | Vortex induced vibration suppression systems and methods |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100150662A1 (en) |
AU (1) | AU2008216318A1 (en) |
BR (1) | BRPI0807475A2 (en) |
GB (1) | GB2459583A (en) |
NO (1) | NO20092995L (en) |
WO (1) | WO2008100976A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9074426B1 (en) * | 2010-11-05 | 2015-07-07 | VIV Solutions LLC | Method and apparatus for accommodating tubular diameter changes |
US9546523B1 (en) | 2014-06-06 | 2017-01-17 | VIV Solutions LLC | Collars for multiple tubulars |
US10669785B1 (en) | 2017-08-30 | 2020-06-02 | VIV Solutions LLC | VIV suppression devices with buoyancy modules |
Citations (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3373807A (en) * | 1966-06-06 | 1968-03-19 | Chevron Res | Underwater pipeline connecting method and apparatus |
US3899991A (en) * | 1973-12-17 | 1975-08-19 | Us Navy | Weather resistant segmented fairing for a tow cable |
US4398487A (en) * | 1981-06-26 | 1983-08-16 | Exxon Production Research Co. | Fairing for elongated elements |
US4474129A (en) * | 1982-04-29 | 1984-10-02 | W. R. Grace & Co. | Riser pipe fairing |
US5410979A (en) * | 1994-02-28 | 1995-05-02 | Shell Oil Company | Small fixed teardrop fairings for vortex induced vibration suppression |
US5421413A (en) * | 1993-11-02 | 1995-06-06 | Shell Oil Company | Flexible fairings to reduce vortex-induced vibrations |
US5549417A (en) * | 1993-11-19 | 1996-08-27 | Shell Oil Company | Subsea pipeline shroud |
US5722340A (en) * | 1996-12-11 | 1998-03-03 | Mobil Oil Corporation | Fairing for marine risers |
US5875728A (en) * | 1994-03-28 | 1999-03-02 | Shell Oil Company | Spar platform |
US5984584A (en) * | 1996-05-10 | 1999-11-16 | Shell Oil Company | Fairings for drilling riser control pod hoses |
US6010278A (en) * | 1996-07-19 | 2000-01-04 | Shell Oil Company | Fairings for deepwater drilling risers |
US6067922A (en) * | 1997-05-08 | 2000-05-30 | Shell Oil Company | Copper protected fairings |
US6092483A (en) * | 1996-12-31 | 2000-07-25 | Shell Oil Company | Spar with improved VIV performance |
US6179524B1 (en) * | 1996-11-15 | 2001-01-30 | Shell Oil Company | Staggered fairing system for suppressing vortex-induced-vibration |
US6196768B1 (en) * | 1996-11-15 | 2001-03-06 | Shell Oil Company | Spar fairing |
US6223672B1 (en) * | 1996-11-15 | 2001-05-01 | Shell Oil Company | Ultrashort fairings for suppressing vortex-induced-vibration |
US6227137B1 (en) * | 1996-12-31 | 2001-05-08 | Shell Oil Company | Spar platform with spaced buoyancy |
US6263824B1 (en) * | 1996-12-31 | 2001-07-24 | Shell Oil Company | Spar platform |
US6276456B1 (en) * | 1998-02-06 | 2001-08-21 | Philip Head | Riser system for sub-sea wells and method of operation |
US6309141B1 (en) * | 1997-12-23 | 2001-10-30 | Shell Oil Company | Gap spar with ducking risers |
US6347911B1 (en) * | 1996-06-11 | 2002-02-19 | Slickbar Products Corp. | Vortex shedding strake wraps for submerged pilings and pipes |
US6551029B2 (en) * | 2000-01-31 | 2003-04-22 | Hongbo Shu | Active apparatus and method for reducing fluid induced stresses by introduction of energetic flow into boundary layer around an element |
US6561734B1 (en) * | 1999-05-07 | 2003-05-13 | Shell Oil Company | Partial helical strake for vortex-induced-vibrationsuppression |
US6565287B2 (en) * | 2000-12-19 | 2003-05-20 | Mcmillan David Wayne | Apparatus for suppression of vortex induced vibration without aquatic fouling and methods of installation |
US6571878B2 (en) * | 1999-09-16 | 2003-06-03 | Shell Oil Company | Smooth buoyancy system for reducing vortex induced vibration in subsea systems |
US6644894B2 (en) * | 2000-01-31 | 2003-11-11 | Shell Oil Company | Passive apparatus and method for reducing fluid induced stresses by introduction of energetic flow into boundary layer around structures |
US6685394B1 (en) * | 2000-08-24 | 2004-02-03 | Shell Oil Company | Partial shroud with perforating for VIV suppression, and method of using |
US6695539B2 (en) * | 2001-10-19 | 2004-02-24 | Shell Oil Company | Apparatus and methods for remote installation of devices for reducing drag and vortex induced vibration |
US6695540B1 (en) * | 2000-11-14 | 2004-02-24 | Weldon Taquino | Vortex induced vibration suppression device and method |
US6702026B2 (en) * | 2000-07-26 | 2004-03-09 | Shell Oil Company | Methods and systems for reducing drag and vortex-induced vibrations on cylindrical structures |
US6886487B2 (en) * | 2000-02-04 | 2005-05-03 | Shell Oil Company | Thruster apparatus and method for reducing fluid-induced motions of and stresses within an offshore platform |
US6928709B2 (en) * | 2001-10-19 | 2005-08-16 | Shell Oil Company | Apparatus for remote installation of devices for reducing drag and vortex induced vibration |
US20050254903A1 (en) * | 2004-05-17 | 2005-11-17 | Mcmillan David W | Methods and apparatus for installation of VIV suppression during installation of marine pipeline |
US20060021560A1 (en) * | 2004-05-02 | 2006-02-02 | Mcmillan David W | Tail fairing designed with features for fast installation and/or for suppression of vortices addition between fairings, apparatus incorporating such fairings, methods of making and using such fairings and apparatus, and methods of installing such fairings |
US7017666B1 (en) * | 1999-09-16 | 2006-03-28 | Shell Oil Company | Smooth sleeves for drag and VIV reduction of cylindrical structures |
US7070361B2 (en) * | 2003-03-06 | 2006-07-04 | Shell Oil Company | Apparatus and methods for providing VIV suppression to a riser system comprising umbilical elements |
US20060233485A1 (en) * | 2005-03-23 | 2006-10-19 | Allen Donald W | Underwater structure monitoring systems and methods |
US20060280559A1 (en) * | 2005-05-24 | 2006-12-14 | Allen Donald W | Apparatus with strake elements and methods for installing strake elements |
US20070003372A1 (en) * | 2005-06-16 | 2007-01-04 | Allen Donald W | Systems and methods for reducing drag and/or vortex induced vibration |
US20070125546A1 (en) * | 2005-09-02 | 2007-06-07 | Allen Donald W | Strake systems and methods |
US20070140797A1 (en) * | 2005-12-19 | 2007-06-21 | Armstrong Stephen P | Systems and methods for installation of clamshell devices around an element |
US20070216285A1 (en) * | 2006-03-14 | 2007-09-20 | Donald Wayne Allen | Current tank systems and methods |
US7316525B2 (en) * | 2005-01-07 | 2008-01-08 | Shell Oil Company | Vortex induced vibration optimizing system |
US7337742B1 (en) * | 2006-08-09 | 2008-03-04 | Viv Suppression, Inc. | Twin fin fairing |
US7398697B2 (en) * | 2004-11-03 | 2008-07-15 | Shell Oil Company | Apparatus and method for retroactively installing sensors on marine elements |
US7406923B2 (en) * | 2005-04-11 | 2008-08-05 | Shell Oil Company | Systems and methods for reducing vibrations |
-
2008
- 2008-02-13 US US12/527,058 patent/US20100150662A1/en not_active Abandoned
- 2008-02-13 AU AU2008216318A patent/AU2008216318A1/en not_active Abandoned
- 2008-02-13 BR BRPI0807475-5A2A patent/BRPI0807475A2/en not_active IP Right Cessation
- 2008-02-13 WO PCT/US2008/053784 patent/WO2008100976A1/en active Application Filing
- 2008-02-13 GB GB0911626A patent/GB2459583A/en not_active Withdrawn
-
2009
- 2009-09-11 NO NO20092995A patent/NO20092995L/en not_active Application Discontinuation
Patent Citations (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3373807A (en) * | 1966-06-06 | 1968-03-19 | Chevron Res | Underwater pipeline connecting method and apparatus |
US3899991A (en) * | 1973-12-17 | 1975-08-19 | Us Navy | Weather resistant segmented fairing for a tow cable |
US4398487A (en) * | 1981-06-26 | 1983-08-16 | Exxon Production Research Co. | Fairing for elongated elements |
US4474129A (en) * | 1982-04-29 | 1984-10-02 | W. R. Grace & Co. | Riser pipe fairing |
US5421413A (en) * | 1993-11-02 | 1995-06-06 | Shell Oil Company | Flexible fairings to reduce vortex-induced vibrations |
US5549417A (en) * | 1993-11-19 | 1996-08-27 | Shell Oil Company | Subsea pipeline shroud |
US5410979A (en) * | 1994-02-28 | 1995-05-02 | Shell Oil Company | Small fixed teardrop fairings for vortex induced vibration suppression |
US5875728A (en) * | 1994-03-28 | 1999-03-02 | Shell Oil Company | Spar platform |
US5984584A (en) * | 1996-05-10 | 1999-11-16 | Shell Oil Company | Fairings for drilling riser control pod hoses |
US6347911B1 (en) * | 1996-06-11 | 2002-02-19 | Slickbar Products Corp. | Vortex shedding strake wraps for submerged pilings and pipes |
US6010278A (en) * | 1996-07-19 | 2000-01-04 | Shell Oil Company | Fairings for deepwater drilling risers |
US6179524B1 (en) * | 1996-11-15 | 2001-01-30 | Shell Oil Company | Staggered fairing system for suppressing vortex-induced-vibration |
US6196768B1 (en) * | 1996-11-15 | 2001-03-06 | Shell Oil Company | Spar fairing |
US6223672B1 (en) * | 1996-11-15 | 2001-05-01 | Shell Oil Company | Ultrashort fairings for suppressing vortex-induced-vibration |
US5722340A (en) * | 1996-12-11 | 1998-03-03 | Mobil Oil Corporation | Fairing for marine risers |
US6092483A (en) * | 1996-12-31 | 2000-07-25 | Shell Oil Company | Spar with improved VIV performance |
US6227137B1 (en) * | 1996-12-31 | 2001-05-08 | Shell Oil Company | Spar platform with spaced buoyancy |
US6263824B1 (en) * | 1996-12-31 | 2001-07-24 | Shell Oil Company | Spar platform |
US6067922A (en) * | 1997-05-08 | 2000-05-30 | Shell Oil Company | Copper protected fairings |
US6309141B1 (en) * | 1997-12-23 | 2001-10-30 | Shell Oil Company | Gap spar with ducking risers |
US6276456B1 (en) * | 1998-02-06 | 2001-08-21 | Philip Head | Riser system for sub-sea wells and method of operation |
US6561734B1 (en) * | 1999-05-07 | 2003-05-13 | Shell Oil Company | Partial helical strake for vortex-induced-vibrationsuppression |
US6571878B2 (en) * | 1999-09-16 | 2003-06-03 | Shell Oil Company | Smooth buoyancy system for reducing vortex induced vibration in subsea systems |
US7017666B1 (en) * | 1999-09-16 | 2006-03-28 | Shell Oil Company | Smooth sleeves for drag and VIV reduction of cylindrical structures |
US6551029B2 (en) * | 2000-01-31 | 2003-04-22 | Hongbo Shu | Active apparatus and method for reducing fluid induced stresses by introduction of energetic flow into boundary layer around an element |
US6644894B2 (en) * | 2000-01-31 | 2003-11-11 | Shell Oil Company | Passive apparatus and method for reducing fluid induced stresses by introduction of energetic flow into boundary layer around structures |
US6886487B2 (en) * | 2000-02-04 | 2005-05-03 | Shell Oil Company | Thruster apparatus and method for reducing fluid-induced motions of and stresses within an offshore platform |
US6702026B2 (en) * | 2000-07-26 | 2004-03-09 | Shell Oil Company | Methods and systems for reducing drag and vortex-induced vibrations on cylindrical structures |
US6685394B1 (en) * | 2000-08-24 | 2004-02-03 | Shell Oil Company | Partial shroud with perforating for VIV suppression, and method of using |
US6695540B1 (en) * | 2000-11-14 | 2004-02-24 | Weldon Taquino | Vortex induced vibration suppression device and method |
US6565287B2 (en) * | 2000-12-19 | 2003-05-20 | Mcmillan David Wayne | Apparatus for suppression of vortex induced vibration without aquatic fouling and methods of installation |
US6994492B2 (en) * | 2001-10-19 | 2006-02-07 | Shell Oil Company | Methods for remote installation of devices for reducing drag and vortex induced vibration |
US6928709B2 (en) * | 2001-10-19 | 2005-08-16 | Shell Oil Company | Apparatus for remote installation of devices for reducing drag and vortex induced vibration |
US20050175415A1 (en) * | 2001-10-19 | 2005-08-11 | Mcmillan David W. | Apparatus and methods for remote installation of devices for reducing drag and vortex induced vibration |
US6695539B2 (en) * | 2001-10-19 | 2004-02-24 | Shell Oil Company | Apparatus and methods for remote installation of devices for reducing drag and vortex induced vibration |
US7070361B2 (en) * | 2003-03-06 | 2006-07-04 | Shell Oil Company | Apparatus and methods for providing VIV suppression to a riser system comprising umbilical elements |
US20060021560A1 (en) * | 2004-05-02 | 2006-02-02 | Mcmillan David W | Tail fairing designed with features for fast installation and/or for suppression of vortices addition between fairings, apparatus incorporating such fairings, methods of making and using such fairings and apparatus, and methods of installing such fairings |
US20050254903A1 (en) * | 2004-05-17 | 2005-11-17 | Mcmillan David W | Methods and apparatus for installation of VIV suppression during installation of marine pipeline |
US20080056828A1 (en) * | 2004-05-17 | 2008-03-06 | Allen Donald W | Methods and Apparatus for Installation of a Device about a Marine Structure |
US7398697B2 (en) * | 2004-11-03 | 2008-07-15 | Shell Oil Company | Apparatus and method for retroactively installing sensors on marine elements |
US7316525B2 (en) * | 2005-01-07 | 2008-01-08 | Shell Oil Company | Vortex induced vibration optimizing system |
US20060233485A1 (en) * | 2005-03-23 | 2006-10-19 | Allen Donald W | Underwater structure monitoring systems and methods |
US7406923B2 (en) * | 2005-04-11 | 2008-08-05 | Shell Oil Company | Systems and methods for reducing vibrations |
US20060280559A1 (en) * | 2005-05-24 | 2006-12-14 | Allen Donald W | Apparatus with strake elements and methods for installing strake elements |
US20070003372A1 (en) * | 2005-06-16 | 2007-01-04 | Allen Donald W | Systems and methods for reducing drag and/or vortex induced vibration |
US20070125546A1 (en) * | 2005-09-02 | 2007-06-07 | Allen Donald W | Strake systems and methods |
US20070140797A1 (en) * | 2005-12-19 | 2007-06-21 | Armstrong Stephen P | Systems and methods for installation of clamshell devices around an element |
US20070216285A1 (en) * | 2006-03-14 | 2007-09-20 | Donald Wayne Allen | Current tank systems and methods |
US7337742B1 (en) * | 2006-08-09 | 2008-03-04 | Viv Suppression, Inc. | Twin fin fairing |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9074426B1 (en) * | 2010-11-05 | 2015-07-07 | VIV Solutions LLC | Method and apparatus for accommodating tubular diameter changes |
US9546523B1 (en) | 2014-06-06 | 2017-01-17 | VIV Solutions LLC | Collars for multiple tubulars |
US10669785B1 (en) | 2017-08-30 | 2020-06-02 | VIV Solutions LLC | VIV suppression devices with buoyancy modules |
Also Published As
Publication number | Publication date |
---|---|
WO2008100976A1 (en) | 2008-08-21 |
NO20092995L (en) | 2009-09-11 |
AU2008216318A1 (en) | 2008-08-21 |
BRPI0807475A2 (en) | 2014-05-13 |
GB2459583A (en) | 2009-11-04 |
GB0911626D0 (en) | 2009-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7070361B2 (en) | Apparatus and methods for providing VIV suppression to a riser system comprising umbilical elements | |
US20070003372A1 (en) | Systems and methods for reducing drag and/or vortex induced vibration | |
EP2049805B1 (en) | Twin fin fairing | |
US6067922A (en) | Copper protected fairings | |
US7406923B2 (en) | Systems and methods for reducing vibrations | |
US6551029B2 (en) | Active apparatus and method for reducing fluid induced stresses by introduction of energetic flow into boundary layer around an element | |
US20070140797A1 (en) | Systems and methods for installation of clamshell devices around an element | |
US20100119308A1 (en) | Suppression of vortex induced vibration | |
EP2379895B1 (en) | Vortex-induced vibration (viv) suppression of riser arrays | |
US20060021560A1 (en) | Tail fairing designed with features for fast installation and/or for suppression of vortices addition between fairings, apparatus incorporating such fairings, methods of making and using such fairings and apparatus, and methods of installing such fairings | |
US20100061809A1 (en) | Systems and methods for reducing drag and/or vortex induced vibration | |
WO2011022332A1 (en) | Vortex induced vibration suppression systems and methods | |
US20100150662A1 (en) | Vortex induced vibration suppression systems and methods | |
WO2010141436A2 (en) | Vortex induced vibration suppression systems and methods | |
WO2007149770A2 (en) | Vortex induced vibration suppression systems and methods | |
USRE48123E1 (en) | Twin fin fairing | |
US20100098497A1 (en) | Vortex induced vibration suppression systems and methods | |
WO2009094355A1 (en) | Vortex induced vibration suppression systems and methods | |
US20090242207A1 (en) | Strake systems and methods | |
WO2009094353A1 (en) | Vortex induced vibration systems and methods | |
WO2008144293A1 (en) | Vortex induced vibration suppression systems and methods | |
BR112019011234A2 (en) | flotation control when submerged structures are towed, lowered and lifted | |
AU2007323831B2 (en) | Systems and methods for reducing drag and/or vortex induced vibration | |
KR102015212B1 (en) | Vortex induced vibration reduction device of offshore structure | |
WO2009046166A1 (en) | Systems and methods for reducing drag and/or vortex induced vibration |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHELL OIL COMPANY,TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ALLEN, DONALD WAYNE;ARMSTRONG, STEPHEN PAUL;MCMILLAN, JANET KAY;AND OTHERS;SIGNING DATES FROM 20090811 TO 20090912;REEL/FRAME:023735/0506 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |